As we are meteorologically speaking, now in the season of summer, let us look back at spring 2012. On reflection, do you feel it was a pleasant one, weather wise for the United Kingdom? As ever, courtesy of my Davis weather station, I can add some meat to the bones to my previous question.
Spring 2012 (March-May) was at its traditional best overall, although with a notable exception here and there. Look at the following plot for a closer view of Newbury, Berkshire’s Maximum Temperatures and Rainfall amounts.
NEWBURY SPRING SEASON TEMPERATURES AND RAINFALL 2012
From the above, it becomes apparent that 2012 proved a mixed bag. Indeed, the local climate changed abruptly on occasions. Take for example, the March rainfall deficit of 29.2mm when compared to the 30-year local average of 50mm. All the talk in the media at this stage was of impending drought and hosepipe bans. However, as most will be aware, April changed all that. Some of this, at least at a local level dramatically changed with a huge surplus of 61mm by the end of the month. May then ended up drier than usual with a deficit of 14.3mm when compared to the local 30-year average. What about the temperatures I hear you ask!
For your information, the 30-year mean temperature averages (Oxford 1971-2000) are as follows. March normally returns 6.3c, April 8.1c and May 11.3c with regard to expected temperatures. Please bear in mind, the figures shown in the above plot only show our achieved maximum temperatures. When mentioning the aforementioned averages, the weather station automatically calculates these against mean minimums and maximums so I don’t have to do the mathematics. Using the plot above you can now analyse the 2012 spring season further with regard to its temperature.
March, with a very warm finish ended 1.6c above the mean. April abruptly turned the warmth to cold with a temperature return 0.8c below the mean. Finally, May 2012 warmed up, especially in the final third to return a local mean, 1.2c above the norm. I attach a final summary below confirming the above figures.
NEWBURY SPRING SEASON CLIMATOLOGICAL SUMMARY 2012
As for the effect on phenology, further news will be forthcoming.
Posted by: Tony William Powellon
No, you did not imagine it, it has been miserable for far too long so I haven’t ventured out much. This is partly the reason for my lack of posts, alongside a busier working life. More news to come, honest!
Met Office News Blog
These are early figures covering 1 – 25 of April and not full month statistics, so are therefore very likely to change. Especially regarding ranking. Full month figures will not be available until provisionally Wednesday 2 May.
Figures for 1 – 25 April show the month so far has seen well above average rainfall across the UK, with 97 mm of rain recorded – this is 139% of the long-term monthly average (1971-2000). The wettest April in the records dating back to 1910 was 2000 which saw 120.3 mm of rain.
Currently the month is the 9th wettest April for the UK in the records. However, it’s not possible to say where the month will end up in the records until all the figures are in at the end of the month – especially as we are expecting heavy rain on Sunday.
Some areas have seen significant rainfall amounts with some parts of the…
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Posted in news, Scientific, weather
Tagged April, climate, climate change, cool, England, environment, Environment Agency, Met Office, meteorology, naturestimeline, news, Rain, showers, spring, united kingdom, weather
Here are my latest offerings from my Phenological sightings.
I first witnessed a Pendunculate Oak (Quercus robur) in budburst on the 3rd April. This matches quite closely to last year’s date of 7th April but is well ahead of 2010’s date of 24th April. The average date on which this bud bursting happens is 14th April, based on a sample of 11 records. Another similar observation being European Larch (Larix decidua) seen leafing. Being the 6th April, it matches 2011’s date and is four days behind 2010. The average date for European Larch leafing comes out at 1st April. As to the reliability of the aforementioned sighting, it is often difficult to separate leafing from budburst, when it comes to European Larch. *However, my keen eye also allowed me to witness Ash (Fraxinus excelsior) in budburst on the 8th April.* This particular event was very early when compared with other years. 2011 being the 24th April and in 2010 it was later still at 6th May. If compared to the average, Ash budburst normally takes place around the 23rd April, albeit based on only seven personal records. A final tree related offering, arrived in the form of European Sycamore (Acer pseudoplatanus) budburst, which I observed for the first time on 9th April. This event ties in nicely against the average observation date, also of 9th April. Now on to some insect related phenomenon.
The 6th April saw a further two annual butterfly sightings with Speckled Wood (Pararge aegeria) and Orange-tip(Anthocharis cardamines) being seen. The Speckled Wood sighting tied in nicely with last year with the 8th April. The average date of first emergence returns the 15th April. As for the first Orange-tip sighting, this year’s emergence is remarkably consistent with last year’s date, the 7th April. Once again, the average date of first emergence returns a date very similar to that of the Speckled Wood in that it is 16th April. Both samples are very healthy at 16 and 18 years of data respectively. News on flowering plants and bird activity to follow. Interestingly, I have not to date, noted Garlic Mustard (Alliaria petiolata) in flower which happens to be the food plant for the caterpillar of the Orange-tip butterfly.
Flowering Wild Garlic (Allium ursinum) was to be in a very early state of emergence in the gloomy weather of yesterday (9th April). This particular event occurred on the 17th April last year and not until 9th May in 2010. I have noted the first emergence of flowering Wild Garlic on nine occasions and this year’s date is the earliest in that dataset. The more usual date for flowering Wild Garlic returns the 24th April. Now some birding activity at last.
Firstly, the birds are a-singing more and more each day now. Mind you, it is not just the singing, which is increasing, so too is the breeding activity. I am pleased to report that on the 5th April, I was fortunate enough to observe a Blackbird (Turdus merula) with food in its beak. The significance of this event of course being that it is most probably feeding young. If this is to be the case, this event is actually behind schedule with the 31st March being the more usual date, albeit based on a rather poor sample of garden records of 6 records. With Red Kites (Milvus milvus) appearing each day above our estate and a flyby Little Egret (Egretta garzetta) being recently added to the garden list, things ornithological wise are very good. Further news from a local woodland patch of mine were groups up 10 Hawfinches (Coccothraustes coccothraustes) seen feeding by other birders but personally, a new migrant arrival pleased me the most. The first returning Willow Warbler (Phylloscopus trochilus) heard singing came about on the 8th April. This event closely matched last year with 6th April being the date and the average returns the 8th April too.
More next time.
Posted by: Tony William Powellon
EDIT: Apologies, the reference to Ash budburst was incorrect, this realated to an instance of Ash flowering. Subsequently there have been many more occurrences.
Posted in birding, birdsound, butterflies, Environmental, insects, my calendar, Nature's Calendar, news, phenology
Tagged April, Ash, Birding, birds, British Wildlife, budburst, butterflies, butterfly, Citizen science, climate, climate change, environment, Hawfinch, Insects, Larch, leafing, nature, Nesting Birds, Oak, Observation, Observing, Orange-tip, Ornithology, phenology, plants, research, science, seasons, Speckled Wood, spring, Sycamore, trees, united kingdom, weather, Willow Warbler